Commit Graph

35 Commits

Author SHA1 Message Date
Linus Torvalds 7e75224188 New driver for HTU21D (humidity sensor)
Add support for Fam16h (Kabini) to k10temp
 Add support for NCT6102D/6106D and NCT6791D to nct6775 driver
 Add support for ADS1115 to ads1015 driver
 Add support for hibernate to w83627ehf and nct6775 drivers
 Some minor cleanups
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 - new driver for HTU21D (humidity sensor)
 - add support for Fam16h (Kabini) to k10temp
 - add support for NCT6102D/6106D and NCT6791D to nct6775 driver
 - add support for ADS1115 to ads1015 driver
 - add support for hibernate to w83627ehf and nct6775 drivers
 - some minor cleanups

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (htu21) Add Measurement Specialties HTU21D support
  hwmon: Change my email address.
  hwmon: (k10temp) Add support for Fam16h (Kabini)
  hwmon: (adt7462) ADT7462_REG_VOLT_MAX() should return 0
  hwmon: (ads1015) Add support for ADS1115
  hwmon: (w83627ehf) Add support for hibernate
  hwmon: (nct6775) Add support for hibernate
  hwmon: use dev_get_platdata()
  hwmon: (nct6775) Fix size of data->temp array
  hwmon: (nct6775) Avoid using device platform data outside probe function
  hwmon: (nct6775) Add support for NCT6791D
  hwmon: (nct6775) Add support for beep attributes
  hwmon: (nct6775) Add support for critical low/high temperature limits on NCT6106
  hwmon: (nct6775) Add support for NCT6102D/6106D
  hwmon: (nct6775) Support two SuperIO chips in the same system
  hwmon: (nct6775) Allocate attributes dynamically from templates
  hwmon: (coretemp) Atom CPUs don't support TjMax; no warning needed
2013-09-03 10:43:35 -07:00
Mark Brown 9e059bacec hwmon: (sht15) Use devm_regulator_get_optional()
Since the sht15 driver supports operation without an external vref
regulator the driver should use the new devm_regulator_get_optional() to
indicate that a stub regulator should not be provided.

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2013-08-19 10:47:15 +01:00
Jingoo Han a8b3a3a53f hwmon: use dev_get_platdata()
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-08-11 22:10:39 -07:00
Mark Brown 3e78080f81 hwmon: (sht15) Check return value of regulator_enable()
Not having power is a pretty serious error so check that we are able to
enable the supply and error out if we can't.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org #3.8+; 3.0+ will need manual backport
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-03 21:45:48 -08:00
Vivien Didelot 412e29c135 hwmon: (sht15) check GPIO directions
Without this patch, the SHT15 driver may fail silently with a
non-bidirectional data line and/or an input-only clock line.

This patch checks the return value of gpio_direction_* function calls
and returns the error code (if any) to the caller. If an error occurs in
the read work function (work_funct_t), we wake the queue up directly
without updating the data->state flag, to notice the waiter of the I/O
error.

The patch also makes minor cleanups: s/error_ret/unlock for some labels
and uses devm_gpio_request_one() for the clock line.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-02-06 09:57:55 -08:00
Vivien Didelot 142c090184 hwmon: (sht15) avoid CamelCase
This patch renames the supply_uV* variables to supply_uv* to avoid
CamelCase as warned by the checkpatch.pl script.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-01-25 21:03:54 -08:00
Bill Pemberton 281dfd0b6e hwmon: remove use of __devexit
CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Alistair John Strachan <alistair@devzero.co.uk>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Juerg Haefliger <juergh@gmail.com>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Roger Lucas <vt8231@hiddenengine.co.uk>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 11:50:34 -08:00
Bill Pemberton 6c931ae1c0 hwmon: remove use of __devinit
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Alistair John Strachan <alistair@devzero.co.uk>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Juerg Haefliger <juergh@gmail.com>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Roger Lucas <vt8231@hiddenengine.co.uk>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 11:49:40 -08:00
Bill Pemberton 9e5e9b7a92 hwmon: remove use of __devexit_p
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Alistair John Strachan <alistair@devzero.co.uk>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Juerg Haefliger <juergh@gmail.com>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Roger Lucas <vt8231@hiddenengine.co.uk>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 11:48:59 -08:00
Vivien Didelot f9b693eb3d hwmon: (sht15) move header to linux/platform_data/
This patch moves the sht15.h header from include/linux to
include/linux/platform_data, and update existing support (stargate2
platform) accordingly.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-09-23 21:08:35 -07:00
Vivien Didelot edec5af7c5 hwmon: (sht15) remove multiple driver registration
Declare an array of platform_device_id, instead of registering a driver
for each supported chip. This makes the code cleaner.
Also add a module description.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-09-23 21:08:34 -07:00
Guenter Roeck 38fe7560a3 hwmon: (sht15) Convert to use devm_ functions
Convert to use devm_ functions to reduce code size and simplify the code.

Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
2012-09-23 21:08:32 -07:00
Frans Meulenbroeks c9e1498a18 hwmon: (sht15) fix checkpatch issues
fixed:
WARNING: line over 80 characters
#809: FILE: sht15.c:809:
+		/* If still not occurred or another handler has been scheduled */

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-03-18 18:26:36 -07:00
Vivien Didelot 6edf3c30af hwmon: (sht15) fix bad error code
When no platform data was supplied, returned error code was 0.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: stable@vger.kernel.org # 2.6.32+
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-01-29 10:35:21 -08:00
Frans Meulenbroeks 179c4fdb56 hwmon: replaced strict_str* with kstr*
replaced strict_strtol with kstrtol and
replaced strict_strtuol with kstrtuol

This satisfies checkpatch -f
Compile tested only: no warnings or errors given

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-01-05 08:19:34 -08:00
Arun Sharma 60063497a9 atomic: use <linux/atomic.h>
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Vivien Didelot e9b6e9f3d4 hwmon: (sht15) Correct a comment mistake
sht15_store_heater() is called on _write_ access to heater_enable.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-07-25 21:46:10 +02:00
Jerome Oufella 82c7465b4d hwmon: (sht15) add support for CRC validation
The sht15 sensor allows validating exchanges to and from the device
using a crc8 function. An utility function to reverse a byte has also
been added.

Signed-off-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2011-05-19 08:19:36 -07:00
Vivien Didelot cc15c7ebb4 hwmon: (sht15) add support for the status register
* Add support for:
  - Heater.
  - End of battery notice.
  - Ability not to reload from OTP.
  - Low resolution (12bit temp, 8bit humidity).
* Add an utility function to read individual bytes from the device.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2011-05-19 08:19:35 -07:00
Vivien Didelot 181148ae68 hwmon: (sht15) clean-up the probe function
* Move the creation of sysfs attributes after the end of the
  initialization, and remove them in the error path.
* Release regulator in the error path.
* Add a soft reset command (need to wait 11ms before next command).

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2011-05-19 08:19:34 -07:00
Vivien Didelot 99a0378de9 hwmon: (sht15) general code clean-up
* Add a documentation file for the device.
* Respect a bit more the kernel-doc syntax.
* Rename some variables for clarity.
* Use bool type for flags.
* Use an enum for states (actions being done).

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2011-05-19 08:19:33 -07:00
Lucas De Marchi 25985edced Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 11:26:23 -03:00
Vivien Didelot ccd32e735d hwmon: (sht15) Fix integer overflow in humidity calculation
An integer overflow occurs in the calculation of RHlinear when the
relative humidity is greater than around 30%. The consequence is a subtle
(but noticeable) error in the resulting humidity measurement.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Cc: Jonathan Cameron <jic23@cam.ac.uk>
2011-03-21 17:59:35 +01:00
Justin P. Mattock 396bd766a6 hwmon: (sht15) Spelling fix
Remove one too many "n" in a word.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
2011-03-21 17:59:35 +01:00
Jean Delvare c7a78d2c2e hwmon: (sht15) Properly handle the case CONFIG_REGULATOR=n
When CONFIG_REGULATOR isn't set, regulator_get_voltage() returns 0.
Properly handle this case by not trusting the value.

Reported-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
2010-04-14 16:14:08 +02:00
Jerome Oufella 328a2c22ab hwmon: (sht15) Fix sht15_calc_temp interpolation function
I discovered two issues.
First the previous sht15_calc_temp() loop did not iterate through the
temppoints array since the (data->supply_uV > temppoints[i - 1].vdd)
test is always true in this direction.

Also the two-points linear interpolation function was returning biased
values due to a stray division by 1000 which shouldn't be there.

[JD: Also change the default value for d1 from 0 to something saner.]

Signed-off-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
2010-04-14 16:14:07 +02:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Jonathan Cameron 4235f684b6 hwmon: (sht15) Off-by-one error in array index + incorrect constants
Fix an off-by-one error in array index + incorrect constants.

Signed-off-by: Christoph Walser <walser@tik.ee.ethz.ch>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-16 21:38:28 +01:00
Linus Torvalds 4c274fff4f Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (s3c-hwmon) Disable build for S3C64xx
  MAINTAINERS: Fix Riku Voipio's address
  hwmon: (asus_atk0110) Enable the EC
  hwmon: (asus_atk0110) Refactor the code
  hwmon: (sht15) Fix spurious section mismatch warning
2009-10-11 11:23:33 -07:00
Alexey Dobriyan d43c36dc6b headers: remove sched.h from interrupt.h
After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-10-11 11:20:58 -07:00
Rakib Mullick cb0f1a1e77 hwmon: (sht15) Fix spurious section mismatch warning
Fix spurious section mismatch warnings, caused due to reference from
variable sht_drivers to
 __devinit/__devexit functions sht15_probe()/remove().

 We were warned by the following warnings:

  LD      drivers/hwmon/built-in.o
WARNING: drivers/hwmon/built-in.o(.data+0x264a0): Section mismatch in
reference from the variable sht_drivers to the function
.devinit.text:sht15_probe()
The variable sht_drivers references
the function __devinit sht15_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x264a4): Section mismatch in
reference from the variable sht_drivers to the function
.devexit.text:sht15_remove()
The variable sht_drivers references
the function __devexit sht15_remove()
If the reference is valid then annotate the
variable with __exit* (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x264f0): Section mismatch in
reference from the variable sht_drivers to the function
.devinit.text:sht15_probe()
The variable sht_drivers references
the function __devinit sht15_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x264f4): Section mismatch in
reference from the variable sht_drivers to the function
.devexit.text:sht15_remove()
The variable sht_drivers references
the function __devexit sht15_remove()
If the reference is valid then annotate the
variable with __exit* (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x26540): Section mismatch in
reference from the variable sht_drivers to the function
.devinit.text:sht15_probe()
The variable sht_drivers references
the function __devinit sht15_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x26544): Section mismatch in
reference from the variable sht_drivers to the function
.devexit.text:sht15_remove()
The variable sht_drivers references
the function __devexit sht15_remove()
If the reference is valid then annotate the
variable with __exit* (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: drivers/hwmon/built-in.o(.data+0x26590): Section mismatch in
reference from the variable sht_drivers to the function
.devinit.text:sht15_probe()
The variable sht_drivers references
the function __devinit sht15_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-09 20:35:17 +02:00
Roel Kluin 560a64a2b5 hwmon: fix freeing of gpio_data and irq
If already requested, gpio_data and irq should be freed in the case of an
error.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-22 07:17:49 -07:00
Joe Perches 24205e0850 hwmon: (sht15) Remove unnecessary semicolon
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-07-11 13:42:37 +02:00
Jean Delvare cd659fd0d7 hwmon: Fix more __devexit_p glitches
Make sure __devexit and devexit_p() match in all hwmon drivers.
Suggested by a similar fix from Mike Frysinger.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
2009-06-15 18:39:45 +02:00
Jonathan Cameron 251eb40f5c hwmon: sht15 humidity sensor driver
Data sheet at:
http://www.sensirion.ch/en/pdf/product_information/Datasheet-humidity-sensor-SHT1x.pdf

These sensors communicate over a 2 wire bus running a device specific
protocol.  The complexity of the driver is mainly due to handling the
substantial delays between requesting a reading and the device pulling the
data line low to indicate that the data is available.  This is handled by
an interrupt that is disabled under all other conditions.

I wasn't terribly clear on the best way to handle this, so comments on
that aspect would be particularly welcome!

Interpretation of the temperature depends on knowing the supply voltage.
If configured in a board config as a regulator consumer this is obtained
from the regulator subsystem.  If not it should be provided in the
platform data.

I've placed this driver in the hwmon subsystem as it is definitely a
device that may be used for hardware monitoring and with it's relatively
slow response times (up to 120 millisecs to get a reading) a caching
strategy certainly seems to make sense!

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-13 15:04:29 -07:00